| /* |
| * OMAP3 Power Management Routines |
| * |
| * Copyright (C) 2006-2008 Nokia Corporation |
| * Tony Lindgren <tony@atomide.com> |
| * Jouni Hogander |
| * |
| * Copyright (C) 2007 Texas Instruments, Inc. |
| * Rajendra Nayak <rnayak@ti.com> |
| * |
| * Copyright (C) 2005 Texas Instruments, Inc. |
| * Richard Woodruff <r-woodruff2@ti.com> |
| * |
| * Based on pm.c for omap1 |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/pm.h> |
| #include <linux/suspend.h> |
| #include <linux/interrupt.h> |
| #include <linux/module.h> |
| #include <linux/list.h> |
| #include <linux/err.h> |
| #include <linux/gpio.h> |
| #include <linux/clk.h> |
| #include <linux/delay.h> |
| #include <linux/slab.h> |
| #include <trace/events/power.h> |
| |
| #include <asm/suspend.h> |
| |
| #include <plat/sram.h> |
| #include "clockdomain.h" |
| #include "powerdomain.h" |
| #include <plat/serial.h> |
| #include <plat/sdrc.h> |
| #include <plat/prcm.h> |
| #include <plat/gpmc.h> |
| #include <plat/dma.h> |
| |
| #include "common.h" |
| #include "cm2xxx_3xxx.h" |
| #include "cm-regbits-34xx.h" |
| #include "prm-regbits-34xx.h" |
| |
| #include "prm2xxx_3xxx.h" |
| #include "pm.h" |
| #include "sdrc.h" |
| #include "control.h" |
| |
| #ifdef CONFIG_SUSPEND |
| static suspend_state_t suspend_state = PM_SUSPEND_ON; |
| #endif |
| |
| /* pm34xx errata defined in pm.h */ |
| u16 pm34xx_errata; |
| |
| struct power_state { |
| struct powerdomain *pwrdm; |
| u32 next_state; |
| #ifdef CONFIG_SUSPEND |
| u32 saved_state; |
| #endif |
| struct list_head node; |
| }; |
| |
| static LIST_HEAD(pwrst_list); |
| |
| static int (*_omap_save_secure_sram)(u32 *addr); |
| void (*omap3_do_wfi_sram)(void); |
| |
| static struct powerdomain *mpu_pwrdm, *neon_pwrdm; |
| static struct powerdomain *core_pwrdm, *per_pwrdm; |
| static struct powerdomain *cam_pwrdm; |
| |
| static inline void omap3_per_save_context(void) |
| { |
| omap_gpio_save_context(); |
| } |
| |
| static inline void omap3_per_restore_context(void) |
| { |
| omap_gpio_restore_context(); |
| } |
| |
| static void omap3_enable_io_chain(void) |
| { |
| int timeout = 0; |
| |
| omap2_prm_set_mod_reg_bits(OMAP3430_EN_IO_CHAIN_MASK, WKUP_MOD, |
| PM_WKEN); |
| /* Do a readback to assure write has been done */ |
| omap2_prm_read_mod_reg(WKUP_MOD, PM_WKEN); |
| |
| while (!(omap2_prm_read_mod_reg(WKUP_MOD, PM_WKEN) & |
| OMAP3430_ST_IO_CHAIN_MASK)) { |
| timeout++; |
| if (timeout > 1000) { |
| pr_err("Wake up daisy chain activation failed.\n"); |
| return; |
| } |
| omap2_prm_set_mod_reg_bits(OMAP3430_ST_IO_CHAIN_MASK, |
| WKUP_MOD, PM_WKEN); |
| } |
| } |
| |
| static void omap3_disable_io_chain(void) |
| { |
| omap2_prm_clear_mod_reg_bits(OMAP3430_EN_IO_CHAIN_MASK, WKUP_MOD, |
| PM_WKEN); |
| } |
| |
| static void omap3_core_save_context(void) |
| { |
| omap3_ctrl_save_padconf(); |
| |
| /* |
| * Force write last pad into memory, as this can fail in some |
| * cases according to errata 1.157, 1.185 |
| */ |
| omap_ctrl_writel(omap_ctrl_readl(OMAP343X_PADCONF_ETK_D14), |
| OMAP343X_CONTROL_MEM_WKUP + 0x2a0); |
| |
| /* Save the Interrupt controller context */ |
| omap_intc_save_context(); |
| /* Save the GPMC context */ |
| omap3_gpmc_save_context(); |
| /* Save the system control module context, padconf already save above*/ |
| omap3_control_save_context(); |
| omap_dma_global_context_save(); |
| } |
| |
| static void omap3_core_restore_context(void) |
| { |
| /* Restore the control module context, padconf restored by h/w */ |
| omap3_control_restore_context(); |
| /* Restore the GPMC context */ |
| omap3_gpmc_restore_context(); |
| /* Restore the interrupt controller context */ |
| omap_intc_restore_context(); |
| omap_dma_global_context_restore(); |
| } |
| |
| /* |
| * FIXME: This function should be called before entering off-mode after |
| * OMAP3 secure services have been accessed. Currently it is only called |
| * once during boot sequence, but this works as we are not using secure |
| * services. |
| */ |
| static void omap3_save_secure_ram_context(void) |
| { |
| u32 ret; |
| int mpu_next_state = pwrdm_read_next_pwrst(mpu_pwrdm); |
| |
| if (omap_type() != OMAP2_DEVICE_TYPE_GP) { |
| /* |
| * MPU next state must be set to POWER_ON temporarily, |
| * otherwise the WFI executed inside the ROM code |
| * will hang the system. |
| */ |
| pwrdm_set_next_pwrst(mpu_pwrdm, PWRDM_POWER_ON); |
| ret = _omap_save_secure_sram((u32 *) |
| __pa(omap3_secure_ram_storage)); |
| pwrdm_set_next_pwrst(mpu_pwrdm, mpu_next_state); |
| /* Following is for error tracking, it should not happen */ |
| if (ret) { |
| printk(KERN_ERR "save_secure_sram() returns %08x\n", |
| ret); |
| while (1) |
| ; |
| } |
| } |
| } |
| |
| /* |
| * PRCM Interrupt Handler Helper Function |
| * |
| * The purpose of this function is to clear any wake-up events latched |
| * in the PRCM PM_WKST_x registers. It is possible that a wake-up event |
| * may occur whilst attempting to clear a PM_WKST_x register and thus |
| * set another bit in this register. A while loop is used to ensure |
| * that any peripheral wake-up events occurring while attempting to |
| * clear the PM_WKST_x are detected and cleared. |
| */ |
| static int prcm_clear_mod_irqs(s16 module, u8 regs) |
| { |
| u32 wkst, fclk, iclk, clken; |
| u16 wkst_off = (regs == 3) ? OMAP3430ES2_PM_WKST3 : PM_WKST1; |
| u16 fclk_off = (regs == 3) ? OMAP3430ES2_CM_FCLKEN3 : CM_FCLKEN1; |
| u16 iclk_off = (regs == 3) ? CM_ICLKEN3 : CM_ICLKEN1; |
| u16 grpsel_off = (regs == 3) ? |
| OMAP3430ES2_PM_MPUGRPSEL3 : OMAP3430_PM_MPUGRPSEL; |
| int c = 0; |
| |
| wkst = omap2_prm_read_mod_reg(module, wkst_off); |
| wkst &= omap2_prm_read_mod_reg(module, grpsel_off); |
| if (wkst) { |
| iclk = omap2_cm_read_mod_reg(module, iclk_off); |
| fclk = omap2_cm_read_mod_reg(module, fclk_off); |
| while (wkst) { |
| clken = wkst; |
| omap2_cm_set_mod_reg_bits(clken, module, iclk_off); |
| /* |
| * For USBHOST, we don't know whether HOST1 or |
| * HOST2 woke us up, so enable both f-clocks |
| */ |
| if (module == OMAP3430ES2_USBHOST_MOD) |
| clken |= 1 << OMAP3430ES2_EN_USBHOST2_SHIFT; |
| omap2_cm_set_mod_reg_bits(clken, module, fclk_off); |
| omap2_prm_write_mod_reg(wkst, module, wkst_off); |
| wkst = omap2_prm_read_mod_reg(module, wkst_off); |
| c++; |
| } |
| omap2_cm_write_mod_reg(iclk, module, iclk_off); |
| omap2_cm_write_mod_reg(fclk, module, fclk_off); |
| } |
| |
| return c; |
| } |
| |
| static int _prcm_int_handle_wakeup(void) |
| { |
| int c; |
| |
| c = prcm_clear_mod_irqs(WKUP_MOD, 1); |
| c += prcm_clear_mod_irqs(CORE_MOD, 1); |
| c += prcm_clear_mod_irqs(OMAP3430_PER_MOD, 1); |
| if (omap_rev() > OMAP3430_REV_ES1_0) { |
| c += prcm_clear_mod_irqs(CORE_MOD, 3); |
| c += prcm_clear_mod_irqs(OMAP3430ES2_USBHOST_MOD, 1); |
| } |
| |
| return c; |
| } |
| |
| /* |
| * PRCM Interrupt Handler |
| * |
| * The PRM_IRQSTATUS_MPU register indicates if there are any pending |
| * interrupts from the PRCM for the MPU. These bits must be cleared in |
| * order to clear the PRCM interrupt. The PRCM interrupt handler is |
| * implemented to simply clear the PRM_IRQSTATUS_MPU in order to clear |
| * the PRCM interrupt. Please note that bit 0 of the PRM_IRQSTATUS_MPU |
| * register indicates that a wake-up event is pending for the MPU and |
| * this bit can only be cleared if the all the wake-up events latched |
| * in the various PM_WKST_x registers have been cleared. The interrupt |
| * handler is implemented using a do-while loop so that if a wake-up |
| * event occurred during the processing of the prcm interrupt handler |
| * (setting a bit in the corresponding PM_WKST_x register and thus |
| * preventing us from clearing bit 0 of the PRM_IRQSTATUS_MPU register) |
| * this would be handled. |
| */ |
| static irqreturn_t prcm_interrupt_handler (int irq, void *dev_id) |
| { |
| u32 irqenable_mpu, irqstatus_mpu; |
| int c = 0; |
| |
| irqenable_mpu = omap2_prm_read_mod_reg(OCP_MOD, |
| OMAP3_PRM_IRQENABLE_MPU_OFFSET); |
| irqstatus_mpu = omap2_prm_read_mod_reg(OCP_MOD, |
| OMAP3_PRM_IRQSTATUS_MPU_OFFSET); |
| irqstatus_mpu &= irqenable_mpu; |
| |
| do { |
| if (irqstatus_mpu & (OMAP3430_WKUP_ST_MASK | |
| OMAP3430_IO_ST_MASK)) { |
| c = _prcm_int_handle_wakeup(); |
| |
| /* |
| * Is the MPU PRCM interrupt handler racing with the |
| * IVA2 PRCM interrupt handler ? |
| */ |
| WARN(c == 0, "prcm: WARNING: PRCM indicated MPU wakeup " |
| "but no wakeup sources are marked\n"); |
| } else { |
| /* XXX we need to expand our PRCM interrupt handler */ |
| WARN(1, "prcm: WARNING: PRCM interrupt received, but " |
| "no code to handle it (%08x)\n", irqstatus_mpu); |
| } |
| |
| omap2_prm_write_mod_reg(irqstatus_mpu, OCP_MOD, |
| OMAP3_PRM_IRQSTATUS_MPU_OFFSET); |
| |
| irqstatus_mpu = omap2_prm_read_mod_reg(OCP_MOD, |
| OMAP3_PRM_IRQSTATUS_MPU_OFFSET); |
| irqstatus_mpu &= irqenable_mpu; |
| |
| } while (irqstatus_mpu); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static void omap34xx_save_context(u32 *save) |
| { |
| u32 val; |
| |
| /* Read Auxiliary Control Register */ |
| asm("mrc p15, 0, %0, c1, c0, 1" : "=r" (val)); |
| *save++ = 1; |
| *save++ = val; |
| |
| /* Read L2 AUX ctrl register */ |
| asm("mrc p15, 1, %0, c9, c0, 2" : "=r" (val)); |
| *save++ = 1; |
| *save++ = val; |
| } |
| |
| static int omap34xx_do_sram_idle(unsigned long save_state) |
| { |
| omap34xx_cpu_suspend(save_state); |
| return 0; |
| } |
| |
| void omap_sram_idle(void) |
| { |
| /* Variable to tell what needs to be saved and restored |
| * in omap_sram_idle*/ |
| /* save_state = 0 => Nothing to save and restored */ |
| /* save_state = 1 => Only L1 and logic lost */ |
| /* save_state = 2 => Only L2 lost */ |
| /* save_state = 3 => L1, L2 and logic lost */ |
| int save_state = 0; |
| int mpu_next_state = PWRDM_POWER_ON; |
| int per_next_state = PWRDM_POWER_ON; |
| int core_next_state = PWRDM_POWER_ON; |
| int per_going_off; |
| int core_prev_state, per_prev_state; |
| u32 sdrc_pwr = 0; |
| |
| pwrdm_clear_all_prev_pwrst(mpu_pwrdm); |
| pwrdm_clear_all_prev_pwrst(neon_pwrdm); |
| pwrdm_clear_all_prev_pwrst(core_pwrdm); |
| pwrdm_clear_all_prev_pwrst(per_pwrdm); |
| |
| mpu_next_state = pwrdm_read_next_pwrst(mpu_pwrdm); |
| switch (mpu_next_state) { |
| case PWRDM_POWER_ON: |
| case PWRDM_POWER_RET: |
| /* No need to save context */ |
| save_state = 0; |
| break; |
| case PWRDM_POWER_OFF: |
| save_state = 3; |
| break; |
| default: |
| /* Invalid state */ |
| printk(KERN_ERR "Invalid mpu state in sram_idle\n"); |
| return; |
| } |
| |
| /* NEON control */ |
| if (pwrdm_read_pwrst(neon_pwrdm) == PWRDM_POWER_ON) |
| pwrdm_set_next_pwrst(neon_pwrdm, mpu_next_state); |
| |
| /* Enable IO-PAD and IO-CHAIN wakeups */ |
| per_next_state = pwrdm_read_next_pwrst(per_pwrdm); |
| core_next_state = pwrdm_read_next_pwrst(core_pwrdm); |
| if (omap3_has_io_wakeup() && |
| (per_next_state < PWRDM_POWER_ON || |
| core_next_state < PWRDM_POWER_ON)) { |
| omap2_prm_set_mod_reg_bits(OMAP3430_EN_IO_MASK, WKUP_MOD, PM_WKEN); |
| if (omap3_has_io_chain_ctrl()) |
| omap3_enable_io_chain(); |
| } |
| |
| pwrdm_pre_transition(); |
| |
| /* PER */ |
| if (per_next_state < PWRDM_POWER_ON) { |
| per_going_off = (per_next_state == PWRDM_POWER_OFF) ? 1 : 0; |
| omap2_gpio_prepare_for_idle(per_going_off); |
| if (per_next_state == PWRDM_POWER_OFF) |
| omap3_per_save_context(); |
| } |
| |
| /* CORE */ |
| if (core_next_state < PWRDM_POWER_ON) { |
| if (core_next_state == PWRDM_POWER_OFF) { |
| omap3_core_save_context(); |
| omap3_cm_save_context(); |
| } |
| } |
| |
| omap3_intc_prepare_idle(); |
| |
| /* |
| * On EMU/HS devices ROM code restores a SRDC value |
| * from scratchpad which has automatic self refresh on timeout |
| * of AUTO_CNT = 1 enabled. This takes care of erratum ID i443. |
| * Hence store/restore the SDRC_POWER register here. |
| */ |
| if (cpu_is_omap3430() && omap_rev() >= OMAP3430_REV_ES3_0 && |
| (omap_type() == OMAP2_DEVICE_TYPE_EMU || |
| omap_type() == OMAP2_DEVICE_TYPE_SEC) && |
| core_next_state == PWRDM_POWER_OFF) |
| sdrc_pwr = sdrc_read_reg(SDRC_POWER); |
| |
| /* |
| * omap3_arm_context is the location where some ARM context |
| * get saved. The rest is placed on the stack, and restored |
| * from there before resuming. |
| */ |
| if (save_state) |
| omap34xx_save_context(omap3_arm_context); |
| if (save_state == 1 || save_state == 3) |
| cpu_suspend(save_state, omap34xx_do_sram_idle); |
| else |
| omap34xx_do_sram_idle(save_state); |
| |
| /* Restore normal SDRC POWER settings */ |
| if (cpu_is_omap3430() && omap_rev() >= OMAP3430_REV_ES3_0 && |
| (omap_type() == OMAP2_DEVICE_TYPE_EMU || |
| omap_type() == OMAP2_DEVICE_TYPE_SEC) && |
| core_next_state == PWRDM_POWER_OFF) |
| sdrc_write_reg(sdrc_pwr, SDRC_POWER); |
| |
| /* CORE */ |
| if (core_next_state < PWRDM_POWER_ON) { |
| core_prev_state = pwrdm_read_prev_pwrst(core_pwrdm); |
| if (core_prev_state == PWRDM_POWER_OFF) { |
| omap3_core_restore_context(); |
| omap3_cm_restore_context(); |
| omap3_sram_restore_context(); |
| omap2_sms_restore_context(); |
| } |
| if (core_next_state == PWRDM_POWER_OFF) |
| omap2_prm_clear_mod_reg_bits(OMAP3430_AUTO_OFF_MASK, |
| OMAP3430_GR_MOD, |
| OMAP3_PRM_VOLTCTRL_OFFSET); |
| } |
| omap3_intc_resume_idle(); |
| |
| pwrdm_post_transition(); |
| |
| /* PER */ |
| if (per_next_state < PWRDM_POWER_ON) { |
| per_prev_state = pwrdm_read_prev_pwrst(per_pwrdm); |
| omap2_gpio_resume_after_idle(); |
| if (per_prev_state == PWRDM_POWER_OFF) |
| omap3_per_restore_context(); |
| } |
| |
| /* Disable IO-PAD and IO-CHAIN wakeup */ |
| if (omap3_has_io_wakeup() && |
| (per_next_state < PWRDM_POWER_ON || |
| core_next_state < PWRDM_POWER_ON)) { |
| omap2_prm_clear_mod_reg_bits(OMAP3430_EN_IO_MASK, WKUP_MOD, |
| PM_WKEN); |
| if (omap3_has_io_chain_ctrl()) |
| omap3_disable_io_chain(); |
| } |
| |
| clkdm_allow_idle(mpu_pwrdm->pwrdm_clkdms[0]); |
| } |
| |
| int omap3_can_sleep(void) |
| { |
| if (!omap_uart_can_sleep()) |
| return 0; |
| return 1; |
| } |
| |
| static void omap3_pm_idle(void) |
| { |
| local_irq_disable(); |
| local_fiq_disable(); |
| |
| if (!omap3_can_sleep()) |
| goto out; |
| |
| if (omap_irq_pending() || need_resched()) |
| goto out; |
| |
| trace_power_start(POWER_CSTATE, 1, smp_processor_id()); |
| trace_cpu_idle(1, smp_processor_id()); |
| |
| omap_sram_idle(); |
| |
| trace_power_end(smp_processor_id()); |
| trace_cpu_idle(PWR_EVENT_EXIT, smp_processor_id()); |
| |
| out: |
| local_fiq_enable(); |
| local_irq_enable(); |
| } |
| |
| #ifdef CONFIG_SUSPEND |
| static int omap3_pm_suspend(void) |
| { |
| struct power_state *pwrst; |
| int state, ret = 0; |
| |
| /* Read current next_pwrsts */ |
| list_for_each_entry(pwrst, &pwrst_list, node) |
| pwrst->saved_state = pwrdm_read_next_pwrst(pwrst->pwrdm); |
| /* Set ones wanted by suspend */ |
| list_for_each_entry(pwrst, &pwrst_list, node) { |
| if (omap_set_pwrdm_state(pwrst->pwrdm, pwrst->next_state)) |
| goto restore; |
| if (pwrdm_clear_all_prev_pwrst(pwrst->pwrdm)) |
| goto restore; |
| } |
| |
| omap3_intc_suspend(); |
| |
| omap_sram_idle(); |
| |
| restore: |
| /* Restore next_pwrsts */ |
| list_for_each_entry(pwrst, &pwrst_list, node) { |
| state = pwrdm_read_prev_pwrst(pwrst->pwrdm); |
| if (state > pwrst->next_state) { |
| printk(KERN_INFO "Powerdomain (%s) didn't enter " |
| "target state %d\n", |
| pwrst->pwrdm->name, pwrst->next_state); |
| ret = -1; |
| } |
| omap_set_pwrdm_state(pwrst->pwrdm, pwrst->saved_state); |
| } |
| if (ret) |
| printk(KERN_ERR "Could not enter target state in pm_suspend\n"); |
| else |
| printk(KERN_INFO "Successfully put all powerdomains " |
| "to target state\n"); |
| |
| return ret; |
| } |
| |
| static int omap3_pm_enter(suspend_state_t unused) |
| { |
| int ret = 0; |
| |
| switch (suspend_state) { |
| case PM_SUSPEND_STANDBY: |
| case PM_SUSPEND_MEM: |
| ret = omap3_pm_suspend(); |
| break; |
| default: |
| ret = -EINVAL; |
| } |
| |
| return ret; |
| } |
| |
| /* Hooks to enable / disable UART interrupts during suspend */ |
| static int omap3_pm_begin(suspend_state_t state) |
| { |
| disable_hlt(); |
| suspend_state = state; |
| return 0; |
| } |
| |
| static void omap3_pm_end(void) |
| { |
| suspend_state = PM_SUSPEND_ON; |
| enable_hlt(); |
| return; |
| } |
| |
| static const struct platform_suspend_ops omap_pm_ops = { |
| .begin = omap3_pm_begin, |
| .end = omap3_pm_end, |
| .enter = omap3_pm_enter, |
| .valid = suspend_valid_only_mem, |
| }; |
| #endif /* CONFIG_SUSPEND */ |
| |
| |
| /** |
| * omap3_iva_idle(): ensure IVA is in idle so it can be put into |
| * retention |
| * |
| * In cases where IVA2 is activated by bootcode, it may prevent |
| * full-chip retention or off-mode because it is not idle. This |
| * function forces the IVA2 into idle state so it can go |
| * into retention/off and thus allow full-chip retention/off. |
| * |
| **/ |
| static void __init omap3_iva_idle(void) |
| { |
| /* ensure IVA2 clock is disabled */ |
| omap2_cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN); |
| |
| /* if no clock activity, nothing else to do */ |
| if (!(omap2_cm_read_mod_reg(OMAP3430_IVA2_MOD, OMAP3430_CM_CLKSTST) & |
| OMAP3430_CLKACTIVITY_IVA2_MASK)) |
| return; |
| |
| /* Reset IVA2 */ |
| omap2_prm_write_mod_reg(OMAP3430_RST1_IVA2_MASK | |
| OMAP3430_RST2_IVA2_MASK | |
| OMAP3430_RST3_IVA2_MASK, |
| OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL); |
| |
| /* Enable IVA2 clock */ |
| omap2_cm_write_mod_reg(OMAP3430_CM_FCLKEN_IVA2_EN_IVA2_MASK, |
| OMAP3430_IVA2_MOD, CM_FCLKEN); |
| |
| /* Set IVA2 boot mode to 'idle' */ |
| omap_ctrl_writel(OMAP3_IVA2_BOOTMOD_IDLE, |
| OMAP343X_CONTROL_IVA2_BOOTMOD); |
| |
| /* Un-reset IVA2 */ |
| omap2_prm_write_mod_reg(0, OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL); |
| |
| /* Disable IVA2 clock */ |
| omap2_cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN); |
| |
| /* Reset IVA2 */ |
| omap2_prm_write_mod_reg(OMAP3430_RST1_IVA2_MASK | |
| OMAP3430_RST2_IVA2_MASK | |
| OMAP3430_RST3_IVA2_MASK, |
| OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL); |
| } |
| |
| static void __init omap3_d2d_idle(void) |
| { |
| u16 mask, padconf; |
| |
| /* In a stand alone OMAP3430 where there is not a stacked |
| * modem for the D2D Idle Ack and D2D MStandby must be pulled |
| * high. S CONTROL_PADCONF_SAD2D_IDLEACK and |
| * CONTROL_PADCONF_SAD2D_MSTDBY to have a pull up. */ |
| mask = (1 << 4) | (1 << 3); /* pull-up, enabled */ |
| padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_MSTANDBY); |
| padconf |= mask; |
| omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_MSTANDBY); |
| |
| padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_IDLEACK); |
| padconf |= mask; |
| omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_IDLEACK); |
| |
| /* reset modem */ |
| omap2_prm_write_mod_reg(OMAP3430_RM_RSTCTRL_CORE_MODEM_SW_RSTPWRON_MASK | |
| OMAP3430_RM_RSTCTRL_CORE_MODEM_SW_RST_MASK, |
| CORE_MOD, OMAP2_RM_RSTCTRL); |
| omap2_prm_write_mod_reg(0, CORE_MOD, OMAP2_RM_RSTCTRL); |
| } |
| |
| static void __init prcm_setup_regs(void) |
| { |
| u32 omap3630_en_uart4_mask = cpu_is_omap3630() ? |
| OMAP3630_EN_UART4_MASK : 0; |
| u32 omap3630_grpsel_uart4_mask = cpu_is_omap3630() ? |
| OMAP3630_GRPSEL_UART4_MASK : 0; |
| |
| /* XXX This should be handled by hwmod code or SCM init code */ |
| omap_ctrl_writel(OMAP3430_AUTOIDLE_MASK, OMAP2_CONTROL_SYSCONFIG); |
| |
| /* |
| * Enable control of expternal oscillator through |
| * sys_clkreq. In the long run clock framework should |
| * take care of this. |
| */ |
| omap2_prm_rmw_mod_reg_bits(OMAP_AUTOEXTCLKMODE_MASK, |
| 1 << OMAP_AUTOEXTCLKMODE_SHIFT, |
| OMAP3430_GR_MOD, |
| OMAP3_PRM_CLKSRC_CTRL_OFFSET); |
| |
| /* setup wakup source */ |
| omap2_prm_write_mod_reg(OMAP3430_EN_IO_MASK | OMAP3430_EN_GPIO1_MASK | |
| OMAP3430_EN_GPT1_MASK | OMAP3430_EN_GPT12_MASK, |
| WKUP_MOD, PM_WKEN); |
| /* No need to write EN_IO, that is always enabled */ |
| omap2_prm_write_mod_reg(OMAP3430_GRPSEL_GPIO1_MASK | |
| OMAP3430_GRPSEL_GPT1_MASK | |
| OMAP3430_GRPSEL_GPT12_MASK, |
| WKUP_MOD, OMAP3430_PM_MPUGRPSEL); |
| /* For some reason IO doesn't generate wakeup event even if |
| * it is selected to mpu wakeup goup */ |
| omap2_prm_write_mod_reg(OMAP3430_IO_EN_MASK | OMAP3430_WKUP_EN_MASK, |
| OCP_MOD, OMAP3_PRM_IRQENABLE_MPU_OFFSET); |
| |
| /* Enable PM_WKEN to support DSS LPR */ |
| omap2_prm_write_mod_reg(OMAP3430_PM_WKEN_DSS_EN_DSS_MASK, |
| OMAP3430_DSS_MOD, PM_WKEN); |
| |
| /* Enable wakeups in PER */ |
| omap2_prm_write_mod_reg(omap3630_en_uart4_mask | |
| OMAP3430_EN_GPIO2_MASK | OMAP3430_EN_GPIO3_MASK | |
| OMAP3430_EN_GPIO4_MASK | OMAP3430_EN_GPIO5_MASK | |
| OMAP3430_EN_GPIO6_MASK | OMAP3430_EN_UART3_MASK | |
| OMAP3430_EN_MCBSP2_MASK | OMAP3430_EN_MCBSP3_MASK | |
| OMAP3430_EN_MCBSP4_MASK, |
| OMAP3430_PER_MOD, PM_WKEN); |
| /* and allow them to wake up MPU */ |
| omap2_prm_write_mod_reg(omap3630_grpsel_uart4_mask | |
| OMAP3430_GRPSEL_GPIO2_MASK | |
| OMAP3430_GRPSEL_GPIO3_MASK | |
| OMAP3430_GRPSEL_GPIO4_MASK | |
| OMAP3430_GRPSEL_GPIO5_MASK | |
| OMAP3430_GRPSEL_GPIO6_MASK | |
| OMAP3430_GRPSEL_UART3_MASK | |
| OMAP3430_GRPSEL_MCBSP2_MASK | |
| OMAP3430_GRPSEL_MCBSP3_MASK | |
| OMAP3430_GRPSEL_MCBSP4_MASK, |
| OMAP3430_PER_MOD, OMAP3430_PM_MPUGRPSEL); |
| |
| /* Don't attach IVA interrupts */ |
| omap2_prm_write_mod_reg(0, WKUP_MOD, OMAP3430_PM_IVAGRPSEL); |
| omap2_prm_write_mod_reg(0, CORE_MOD, OMAP3430_PM_IVAGRPSEL1); |
| omap2_prm_write_mod_reg(0, CORE_MOD, OMAP3430ES2_PM_IVAGRPSEL3); |
| omap2_prm_write_mod_reg(0, OMAP3430_PER_MOD, OMAP3430_PM_IVAGRPSEL); |
| |
| /* Clear any pending 'reset' flags */ |
| omap2_prm_write_mod_reg(0xffffffff, MPU_MOD, OMAP2_RM_RSTST); |
| omap2_prm_write_mod_reg(0xffffffff, CORE_MOD, OMAP2_RM_RSTST); |
| omap2_prm_write_mod_reg(0xffffffff, OMAP3430_PER_MOD, OMAP2_RM_RSTST); |
| omap2_prm_write_mod_reg(0xffffffff, OMAP3430_EMU_MOD, OMAP2_RM_RSTST); |
| omap2_prm_write_mod_reg(0xffffffff, OMAP3430_NEON_MOD, OMAP2_RM_RSTST); |
| omap2_prm_write_mod_reg(0xffffffff, OMAP3430_DSS_MOD, OMAP2_RM_RSTST); |
| omap2_prm_write_mod_reg(0xffffffff, OMAP3430ES2_USBHOST_MOD, OMAP2_RM_RSTST); |
| |
| /* Clear any pending PRCM interrupts */ |
| omap2_prm_write_mod_reg(0, OCP_MOD, OMAP3_PRM_IRQSTATUS_MPU_OFFSET); |
| |
| omap3_iva_idle(); |
| omap3_d2d_idle(); |
| } |
| |
| void omap3_pm_off_mode_enable(int enable) |
| { |
| struct power_state *pwrst; |
| u32 state; |
| |
| if (enable) |
| state = PWRDM_POWER_OFF; |
| else |
| state = PWRDM_POWER_RET; |
| |
| list_for_each_entry(pwrst, &pwrst_list, node) { |
| if (IS_PM34XX_ERRATUM(PM_SDRC_WAKEUP_ERRATUM_i583) && |
| pwrst->pwrdm == core_pwrdm && |
| state == PWRDM_POWER_OFF) { |
| pwrst->next_state = PWRDM_POWER_RET; |
| pr_warn("%s: Core OFF disabled due to errata i583\n", |
| __func__); |
| } else { |
| pwrst->next_state = state; |
| } |
| omap_set_pwrdm_state(pwrst->pwrdm, pwrst->next_state); |
| } |
| } |
| |
| int omap3_pm_get_suspend_state(struct powerdomain *pwrdm) |
| { |
| struct power_state *pwrst; |
| |
| list_for_each_entry(pwrst, &pwrst_list, node) { |
| if (pwrst->pwrdm == pwrdm) |
| return pwrst->next_state; |
| } |
| return -EINVAL; |
| } |
| |
| int omap3_pm_set_suspend_state(struct powerdomain *pwrdm, int state) |
| { |
| struct power_state *pwrst; |
| |
| list_for_each_entry(pwrst, &pwrst_list, node) { |
| if (pwrst->pwrdm == pwrdm) { |
| pwrst->next_state = state; |
| return 0; |
| } |
| } |
| return -EINVAL; |
| } |
| |
| static int __init pwrdms_setup(struct powerdomain *pwrdm, void *unused) |
| { |
| struct power_state *pwrst; |
| |
| if (!pwrdm->pwrsts) |
| return 0; |
| |
| pwrst = kmalloc(sizeof(struct power_state), GFP_ATOMIC); |
| if (!pwrst) |
| return -ENOMEM; |
| pwrst->pwrdm = pwrdm; |
| pwrst->next_state = PWRDM_POWER_RET; |
| list_add(&pwrst->node, &pwrst_list); |
| |
| if (pwrdm_has_hdwr_sar(pwrdm)) |
| pwrdm_enable_hdwr_sar(pwrdm); |
| |
| return omap_set_pwrdm_state(pwrst->pwrdm, pwrst->next_state); |
| } |
| |
| /* |
| * Enable hw supervised mode for all clockdomains if it's |
| * supported. Initiate sleep transition for other clockdomains, if |
| * they are not used |
| */ |
| static int __init clkdms_setup(struct clockdomain *clkdm, void *unused) |
| { |
| if (clkdm->flags & CLKDM_CAN_ENABLE_AUTO) |
| clkdm_allow_idle(clkdm); |
| else if (clkdm->flags & CLKDM_CAN_FORCE_SLEEP && |
| atomic_read(&clkdm->usecount) == 0) |
| clkdm_sleep(clkdm); |
| return 0; |
| } |
| |
| /* |
| * Push functions to SRAM |
| * |
| * The minimum set of functions is pushed to SRAM for execution: |
| * - omap3_do_wfi for erratum i581 WA, |
| * - save_secure_ram_context for security extensions. |
| */ |
| void omap_push_sram_idle(void) |
| { |
| omap3_do_wfi_sram = omap_sram_push(omap3_do_wfi, omap3_do_wfi_sz); |
| |
| if (omap_type() != OMAP2_DEVICE_TYPE_GP) |
| _omap_save_secure_sram = omap_sram_push(save_secure_ram_context, |
| save_secure_ram_context_sz); |
| } |
| |
| static void __init pm_errata_configure(void) |
| { |
| if (cpu_is_omap3630()) { |
| pm34xx_errata |= PM_RTA_ERRATUM_i608; |
| /* Enable the l2 cache toggling in sleep logic */ |
| enable_omap3630_toggle_l2_on_restore(); |
| if (omap_rev() < OMAP3630_REV_ES1_2) |
| pm34xx_errata |= PM_SDRC_WAKEUP_ERRATUM_i583; |
| } |
| } |
| |
| static int __init omap3_pm_init(void) |
| { |
| struct power_state *pwrst, *tmp; |
| struct clockdomain *neon_clkdm, *per_clkdm, *mpu_clkdm, *core_clkdm; |
| int ret; |
| |
| if (!cpu_is_omap34xx()) |
| return -ENODEV; |
| |
| if (!omap3_has_io_chain_ctrl()) |
| pr_warning("PM: no software I/O chain control; some wakeups may be lost\n"); |
| |
| pm_errata_configure(); |
| |
| /* XXX prcm_setup_regs needs to be before enabling hw |
| * supervised mode for powerdomains */ |
| prcm_setup_regs(); |
| |
| ret = request_irq(INT_34XX_PRCM_MPU_IRQ, |
| (irq_handler_t)prcm_interrupt_handler, |
| IRQF_DISABLED, "prcm", NULL); |
| if (ret) { |
| printk(KERN_ERR "request_irq failed to register for 0x%x\n", |
| INT_34XX_PRCM_MPU_IRQ); |
| goto err1; |
| } |
| |
| ret = pwrdm_for_each(pwrdms_setup, NULL); |
| if (ret) { |
| printk(KERN_ERR "Failed to setup powerdomains\n"); |
| goto err2; |
| } |
| |
| (void) clkdm_for_each(clkdms_setup, NULL); |
| |
| mpu_pwrdm = pwrdm_lookup("mpu_pwrdm"); |
| if (mpu_pwrdm == NULL) { |
| printk(KERN_ERR "Failed to get mpu_pwrdm\n"); |
| goto err2; |
| } |
| |
| neon_pwrdm = pwrdm_lookup("neon_pwrdm"); |
| per_pwrdm = pwrdm_lookup("per_pwrdm"); |
| core_pwrdm = pwrdm_lookup("core_pwrdm"); |
| cam_pwrdm = pwrdm_lookup("cam_pwrdm"); |
| |
| neon_clkdm = clkdm_lookup("neon_clkdm"); |
| mpu_clkdm = clkdm_lookup("mpu_clkdm"); |
| per_clkdm = clkdm_lookup("per_clkdm"); |
| core_clkdm = clkdm_lookup("core_clkdm"); |
| |
| #ifdef CONFIG_SUSPEND |
| suspend_set_ops(&omap_pm_ops); |
| #endif /* CONFIG_SUSPEND */ |
| |
| pm_idle = omap3_pm_idle; |
| omap3_idle_init(); |
| |
| /* |
| * RTA is disabled during initialization as per erratum i608 |
| * it is safer to disable RTA by the bootloader, but we would like |
| * to be doubly sure here and prevent any mishaps. |
| */ |
| if (IS_PM34XX_ERRATUM(PM_RTA_ERRATUM_i608)) |
| omap3630_ctrl_disable_rta(); |
| |
| clkdm_add_wkdep(neon_clkdm, mpu_clkdm); |
| if (omap_type() != OMAP2_DEVICE_TYPE_GP) { |
| omap3_secure_ram_storage = |
| kmalloc(0x803F, GFP_KERNEL); |
| if (!omap3_secure_ram_storage) |
| printk(KERN_ERR "Memory allocation failed when" |
| "allocating for secure sram context\n"); |
| |
| local_irq_disable(); |
| local_fiq_disable(); |
| |
| omap_dma_global_context_save(); |
| omap3_save_secure_ram_context(); |
| omap_dma_global_context_restore(); |
| |
| local_irq_enable(); |
| local_fiq_enable(); |
| } |
| |
| omap3_save_scratchpad_contents(); |
| err1: |
| return ret; |
| err2: |
| free_irq(INT_34XX_PRCM_MPU_IRQ, NULL); |
| list_for_each_entry_safe(pwrst, tmp, &pwrst_list, node) { |
| list_del(&pwrst->node); |
| kfree(pwrst); |
| } |
| return ret; |
| } |
| |
| late_initcall(omap3_pm_init); |